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Analog Electronics

Analog Electronics
Which of the following is trivalent impurity ?

 Silicon
 Boron
None of these
 Antimony

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Analog Electronics
If the zener diode in a zener regulator is connected with the wrong polarity, the load voltage will be closest to

  0.7 V.
  18 V.
  10 V.
  14 V.

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Analog Electronics
Thermal runaway is not possible in FET because as the temperature of FET increases

The mobility decreases
None of these
The drain current increases
The transconductance increases

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Analog Electronics
An npn BJT has gm=38mA/v, cµ =10¯14 F, cπ =10¯13F and DC current gain β0=90.For this transistor fT & fβ are

fT =1.47 x 1010 Hz & fβ = 1.64 x 108 Hz
fT =1.47 x 1010 Hz & fβ = 1.33 x 1012 Hz
fT =1.64 x 108 Hz & fβ = 1.47 x 1010 Hz
fT =1.33 x 1012 Hz & fβ = 1.47 x 1010 Hz

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Analog Electronics
The base-emitter voltage of an ideal transistor is

 0.7 V.
  0 V.
 1 V.
 0.3 V.

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Analog Electronics
Relaxation Voltage controlled oscillators are used to generate

 Both B and C
 Sawtooth wave
 Triangular wave
 Sinusoidal wave

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